Frankea Dabbs, a homeless woman, is accused of leaving her baby abandoned on a subway platform. Photo: William C Lopez

A homeless woman accused of abandoning her baby at the Columbus Circle subway station struggled to care for the infant after her daughter’s dad was murdered, a family member said on Tuesday.

Before Frankea Aleasha Dabbs ditched her 7-month-old girl on the uptown platform at the 59th Street station, the 20-year-old mom was struggling with her boyfriend’s death — a killing she had witnessed in North Carolina while cowering under a bed.

Dabbs told cops she came to New York July 2, but was overwhelmed by the responsibility of caring for the child.

“She felt she couldn’t take care of the baby and thought she was leaving her in a safe public space,” said Stephen Davis, an NYPD spokesman.

Relatives said Dabbs has been spiraling downward for years.

“I pray that they get help for Frankea,” said Lawanna Edmonds, an aunt who lives in North Carolina. “There’s a lot she’s going through. But I know for myself that Frankea loves her baby.”

A witness told cops the woman was pushing her baby in a stroller in the first car of the uptown No. 1 train on Monday at about 11:50 a.m.

When the train pulled into the station, she shoved the stroller out of the car before the doors closed and continued riding on the train.

A passenger had seen the mother and child board the train at Times Square, police said. The passenger got off at Columbus Circle and noticed the unattended stroller on the platform and the mother still inside the train.